code: def generate(self, corpus_length=0):
      corpus = ""
      if corpus_length == 0:
          corpus_length = random.randint(5, 15)
      for i in range(corpus_length):
          if random.random() < 0.2:
              corpus += "{}".format(random.choice(self.en_char_list))
          else:
              corpus += "{}".format(random.choice(self.num_list))
      return "en", corpus
  
file_path: PaddleOCR/StyleText/engine/corpus_generators.py
imports: import random
  from utils.logging import get_logger
label_desc: Use image node_id 2 for calling the EnNumCorpus obj's underlying member method code with example usage: obj.generate(corpus_length) and returns: str,  corpus